A5100715878- Advanced Radiotherapy Techniques
- Medical Imaging Techniques and Applications
- Laser Material Processing Techniques
- Advanced X-ray and CT Imaging
- Radiation Dose and Imaging
- Radiation Therapy and Dosimetry
- Ocular and Laser Science Research
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Optical Coherence Tomography Applications
- Photoacoustic and Ultrasonic Imaging
- Astrophysics and Star Formation Studies
- Advanced Fluorescence Microscopy Techniques
- Traffic Prediction and Management Techniques
- Laser-induced spectroscopy and plasma
- Radiomics and Machine Learning in Medical Imaging
- Transportation Planning and Optimization
- Advanced Surface Polishing Techniques
- Autonomous Vehicle Technology and Safety
- Laser Applications in Dentistry and Medicine
- Advanced MRI Techniques and Applications
- Traffic control and management
- Dental Radiography and Imaging
- Image Processing Techniques and Applications
- Characterization and Applications of Magnetic Nanoparticles
Yonsei University
2016-2025
Kyungpook National University
2012-2025
Keio University
2021-2023
Armed Forces Capital Hospital
2023
Seoul National University Hospital
2023
Hanyang University
2006-2023
University of Pennsylvania
2023
Korea University of Technology and Education
2022
Tokyo Medical and Dental University
2022
National Hospital Organization
2022
The global pandemic of coronavirus disease 2019 (COVID-19) has resulted in an increased demand for testing, diagnosis, and treatment. Reverse transcription polymerase chain reaction (RT-PCR) is the definitive test diagnosis COVID-19; however, chest X-ray radiography (CXR) a fast, effective, affordable that identifies possible COVID-19-related pneumonia. This study investigates feasibility using deep learning-based decision-tree classifier detecting COVID-19 from CXR images. proposed...
High energy laser systems are ultimately limited by laser-induced damage to their critical components. This is especially true of fused silica optics, which grows rapidly upon exposure additional pulses. Much progress has been made in eliminating precursors as-processed optics (the advanced mitigation process, AMP3), and very high resistance demonstrated laboratory studies. However, the full potential these improvements not yet realized actual systems. In this work, we explore importance...
Reverse electrodialysis (RED) directly harvests renewable energy from salinity gradients, and the achievable potential power heavily relies on ion exchange membranes. Graphene oxides (GOs) are considered a solid candidate for RED membrane because laminated GO nanochannels with charged functional groups provide an excellent ionic selectivity conductivity. Yet, high internal resistance poor stability in aqueous solutions limit performance. Here, we develop that concurrently achieves...
The purpose of this study was to investigate the effect optical pulse duration on stone retropulsion during Ho:YAG (lambda = 2.12 microm) laser lithotripsy.A clinical with durations employed fragment calculus phantoms and evaluate phantom retropulsion. At a given energy, were divided into two discrete conditions: short (tau(p): 120 approximately 190 microseconds at FWHM) long 210 350 FWHM). Plaster Paris ablated different energy levels using fibers varying diameters (273, 365, 550 microm in...
Volumetric cone-beam CT (CBCT) images are acquired repeatedly during a course of radiation therapy and natural question to ask is whether CBCT obtained earlier in the process can be utilized as prior knowledge reduce patient imaging dose subsequent scans. The purpose this work develop an adaptive image constrained compressed sensing (APICCS) method solve problem. Reconstructed using full projections taken on first day treatment used images. scans protocol sparse projections. In proposed...
Vehicle classification data are used for numerous transportation applications. Most of the come from permanent in-pavement sensors or temporary mounted on pavement. This study developed a lidar-based system that in side-fire configuration next to road. The first distinguished between vehicle returns and nonvehicle returns, then clustered into individual vehicles. An algorithm examined each cluster check any evidence partial occlusion another vehicle. Several measurements were taken...
While atlas segmentation (AS) has proven to be a time-saving and promising method for radiation therapy contouring, optimal methods its use have not been well-established. Therefore, we investigated the relationship between size of patient population auto contouring (AC) performance. A total 110 patients' head planning CT images were selected. The mandible thyroid selected this study. mandibles thyroids carefully segmented by two skilled clinicians. Of patients, 100 random patients...
Abstract This work aims to investigate the clinical feasibility of deep learning-based synthetic CT images for cervix cancer, comparing them MR calculating attenuation (MRCAT). Patient cohort with 50 pairs T2-weighted and from cervical cancer patients was split into 40 training 10 testing phases. We conducted deformable image registration Nyul intensity normalization maximize similarity between as a preprocessing step. The processed were plugged learning model, generative adversarial...
The standard liver volume (LV) of a recipient is estimated in transplantation to determine the minimum LV necessary for recipient. Simple linear formulas estimation were developed Japanese and Caucasian populations. present study examined applicability reported Korean population. Liver density (LD) was determined by analyzing 24 healthy livers. Data weight (LW), body (BW), height (BH), surface area (BSA), age obtained from 652 postmortem examination reports (age, 42.4 ± 16.5 years) showing...
Laser ablation of aluminum metal with 1ns, 800nm pulse at low radiant exposures was investigated in air (dry) and water (wet) environments. Compared to dry ablation, an approximately eight times increase material removal rate associated wet ablation. Based on optical reflectance scanning electron microscope images, bubble formation/collapse responsible for augmented acoustic pressure performance. Numerically simulated temperature distributions during were consistent the occurrence explosive...
To determine the relative accuracy of automated blood-free to blood-filled computed tomographic (CT) volumetry for estimation right-lobe weight in living donor liver transplantation.This retrospective study was approved by institutional review board; informed consent waived. Between October 1, 2008, and April 30, 2009, 88 live donors (54 men, 34 women; mean age, 26.1 years +/- 6.9 [standard deviation]) who underwent CT had their right lobes procured institution were included. Automated...
Purpose : X‐ray scatter incurred to detectors degrades the quality of cone‐beam computed tomography (CBCT) and represents a problem in volumetric image guided adaptive radiation therapy. Several methods using beam blocker for estimation subtraction have been proposed. However, due missing information resulting from obstruction blocker, such require dual scanning or dynamically moving obtain complete image. Here, we propose half blocker‐based approach, conjunction with total variation (TV)...
In this work, energy and exergy analyses are carried out for a combined cycle consisting of an organic Rankine (ORC) liquefied natural gas (LNG) the recovery low-grade heat sources LNG cold energy. The effects turbine inlet pressure working fluid on system performance theoretically investigated. A modified temperature-enthalpy diagram is proposed, which can be useful to see characteristics cycle, as well temperature distributions in exchangers. Results show that thermal efficiency increases...
The protein RAS association domain family 1A (RASSF1A), which is encoded by a gene that frequently silenced in many types of sporadic tumor, functions mitosis as regulator the anaphase-promoting complex (APC). With use yeast two-hybrid screen, we identified human protein, previously designated C19ORF5, interacts with RASSF1A. This here redesignated RASSF1A-binding 1 (RABP1), contains two microtubule-associated domains, and its RASSF1A was confirmed mammalian cells immunoprecipitation...
Selective laser targeting of the retinal pigment epithelium (RPE) is an attractive method for treating RPE-associated disorders. We are developing a optically detecting intracellular microcavitation that can potentially serve as immediate feedback treatment outcome. Thermal denaturation or cavitation kill RPE cells during selective targeting. examined cell damage mechanism pulse durations from 1 to 40 µs ex vivo. Intracellular was detected transient increase in backscattered beam. Cavitation...
In semiconductor inspection equipment, a chuck used to hold wafer is equipped with cooling or heating system for temperature uniformity across the surface of wafer. Surface important increasing speed. Triply periodic minimal surfaces (TPMSs) are proposed enhance uniformity. TPMSs topic research in field additive manufacturing and type metamaterial inspired by nature. no intersections. Their continuous curve offers self-support during process. This structure enables division single space into...
Background/Aim: Log data from radiation treatment machines can play a crucial role in quality assurance by enabling the recalculation of delivered dose distribution and identification deviations delivery. This article proposes novel method for recalculating carbon-ion therapy using log data. Materials Methods: The proposed approach leverages existing functionality commercial planning systems, thus eliminating need specialized in-house software calculation evaluation. performed tests entail...